Ultra-Fast Laser Causes Magnetic Switching (image) DOE/Ames Laboratory Share Print E-Mail Caption Magnetic structure in a colossal magneto-resistive manganite is switched from antiferromagnetic to ferromagnetic ordering duringabout 100 femtosecond laser pulse photo-excitation. With time so short and the laser pulses still interacting with magnetic moments, the magnetic switching is driven quantum mechanically -- not thermally. This potentially opens the door to terahertz and faster memory writing/reading speeds. Credit US Deptartment of Energy's Ames Laboratory Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.